[vcalder]

While I was waiting for a reply on the issue below, I did some more testing. I think I found my problem, so I'm posting it here in hopes it may help someone with a similar problem. I was able to get to the wiring from the switch on this unit to test the compressor windings with an ohmmeter. The two windings measured 1.5 and 3 ohms, so I'm assuming my compressor is ok. I found that the contact on the switch that is common to all three cooling speed settings but not the fan only setting was not "making". That is the likely reason the fan will run on all settings but the compressor won't ever turn on. I guess I'll go ahead and order a new switch and hope that is all that is wrong.

Original Post:

This unit has been working fine, but suddenly will not turn the compressor on. I suspect the problem is either the capacitor, the temperature control (thermostat) switch, or the fan control (which controls whether it is just fan, low cool, high cool or turbo cool). To avoid buying all three parts, can anyone help me narrow it down?

When I turn the fan control from fan only to one of the cooling settings, it seems to work fine (various fan speeds) but the compressor won't turn on, regardless of where I have the thermostat control set. I'm thinking the capacitor or the thermostat control are the more likely culprits.

I'm pretty handy troubleshooting electrical stuff, but I could use a tip on the best test to isolate the problem to avoid buying both parts. I didn't know whether the capacitor is a start or just a run capacitor, so I'm not sure how best to try to get the compressor to turn on to make sure there is nothing wrong with it.

[thisnamebetternotbetaken]

Fan switches are a common problem and it sounds as though your compressor is good. However I would venture to bet that all you are needing is a Hard-start kit. Over time compressors will have a harder time starting and tend to require an extra "burst" of energyto get them going. A hard start kit consists of a relay and a start capacitor. Often times they will be integrated into a single small unit that will connect directly yo your compressor. See link below

United Refrigeration, Inc.

[Icehouse]

You can jump-out the thermostat to by-pass it. As for the capacitor you test with your meter. BTW United is for people in the trade.